TITLE: GCN CIRCULAR NUMBER: 38650 SUBJECT: GRB 241223A: Fermi GBM Final Real-time Localization DATE: 24/12/23 12:19:24 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov> The Fermi GBM team reports the detection of a likely LONG GRB At 12:08:46 UT on 23 Dec 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241223A (trigger 756648531.631546 / 241223506). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 159.9, Dec = -34.8 (J2000 degrees, equivalent to J2000 10h 39m, -34d 47'), with a statistical uncertainty of 1.0 degrees. The angle from the Fermi LAT boresight is 67.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241223506/q... The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241223506/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241223506/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/38650. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...